Gurgaon: Congress leader VC Shukla, who was critically injured in the Maoist attack on party leaders in Chhattisgarh last week, continues to remain critical, doctors attending on him said on Wednesday.

"He is still critical but conscious. He has been put on ventilator and administered strong antibiotics to contain the infection. We are closely monitoring him," a doctor treating Shukla at Medanta Medicity said.

Doctors had performed exploratory laparotomy surgery (a diagnostic tool that allows physicians to examine the abdominal organs) on Sunday when he was admitted to the hospital.

Shukla, 84, a former union minister, received three bullet injuries and lost a lot of blood in the attack on a Congress convoy in Chhattisgarh's Bastar region on Saturday. About 30 people, including two senior leaders, were killed in the attack.

Shukla was flown in an air ambulance to Delhi, and taken to Medanta Medicity in Gurgaon, where a multi-disciplinary team of doctors is treating him.